Aluminum 5B05
GB 5B05
5B05 (LF10) is an Al-Mg5 wrought alloy in the same strength class as 5A05 and 5056, supplied mainly as welding wire and cladding stock rather than as a structural mill product.
Reference datasheet — 5B05 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the O condition
5B05 tempers and conditions
5B05 is supplied in 6 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-welded deposit | Use these all-weld-metal deposit values when the Al-Mg5 filler wire joins 5000 series and some 6000-series base metals by TIG/MIG: 130 MPa yield, 275 MPa tensile, 17 % elongation, no post-weld treatment. | 130 | 275 | 17 | 62 HB | 29 % IACS |
ODefault Annealed | Use the annealed (M) supply state for welding wire, rivet blanks and parts that must be deep drawn or bent; 145 MPa yield with 20% elongation and formability 70. | 145 | 275 | 20 | 65 HB | 29 % IACS |
Strain hardened from hot working only | Choose this as-fabricated hot-worked state of hot-rolled plate and extruded bar for welded structural blanks; strength sits slightly above annealed at 155 MPa yield with 16 % elongation. | 155 | 285 | 16 | 70 HB | 29 % IACS |
Strain hardened and stabilized, quarter hard | Pick strain-hardened quarter-hard, stabilized sheet and strip when 210 MPa yield must coexist with bend formability; the stabilizing step prevents Mg precipitation softening. | 210 | 305 | 12 | 80 HB | 29 % IACS |
Strain hardened, half hard | Use half-hard cold-drawn wire or strip for rivets and profiles that need 250 MPa yield plus some re-bending capacity; elongation drops to 8 % and formability is limited. | 250 | 330 | 8 | 88 HB | 28.5 % IACS |
Strain hardened, full hard | Choose the full-hard cold-drawn state for rivet wire and fastener blanks requiring high shear strength (320 MPa yield); elongation falls to 5 %, so forming is largely ruled out. | 320 | 385 | 5 | 105 HB | 28 % IACS |
What is 5B05?
5B05 (LF10) is an Al-Mg5 wrought alloy in the same strength class as 5A05 and 5056, supplied mainly as welding wire and cladding stock rather than as a structural mill product. Annealed properties are 145 MPa yield, 275 MPa tensile, 20% elongation and HB 65, and its composition matches the Al-Mg base metals it is used to join or clad. Formability is 70, machinability 40, thermal conductivity 117 W/m·K and continuous service should stay at or below 80 °C. Use 5A05 when sheet or plate for load-bearing parts is required. 5B05 has a density of 2.64 g/cm³ (0.0954 lb/in³), lighter than 94% of aluminum grades. It melts at 568°C (1,054 °F). 5B05 has a yield strength of 145 MPa (21 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 68% of aluminum grades. Elongation at break is 20% and the elastic modulus is 70 GPa (10.2 Msi).
What is 5B05 used for?
- welding wire
- cladding layers
- welded aluminum structures
Advantages
- Ductile — tolerates forming and impact — 20%, better than 89% of aluminum grades
- Readily welded — 88/100, better than 85% of aluminum grades
- Good corrosion resistance — 72/100, better than 83% of aluminum grades
- Forms and bends easily — 70/100, better than 83% of aluminum grades
Limitations
- Limited service temperature — 80°C (176 °F), worse than 94% of aluminum grades
- Poor heat conductor — 117 W/m·K (67.6 BTU/hr·ft·°F), worse than 83% of aluminum grades
- Difficult to machine — 40/100, worse than 81% of aluminum grades
- Low electrical conductivity — 29 % IACS, worse than 78% of aluminum grades
5B05 properties
Typical room-temperature values for 5B05-O; bars are the position among aluminum grades.
Physical3
5B05 has a density of 2.64 g/cm³ (0.0954 lb/in³), lighter than 94% of aluminum grades. It melts at 568°C (1,054 °F).
Mechanical11
5B05 has a yield strength of 145 MPa (21 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 68% of aluminum grades. Elongation at break is 20% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5B05 is rated for continuous service to 80°C (176 °F). It conducts heat at 117 W/m·K (67.6 BTU/hr·ft·°F), worse than 83% of aluminum grades. Thermal expansion is 24.1 µm/m·K (13.4 µin/in·°F).
Electrical3
5B05 conducts electricity at 29 % IACS, worse than 78% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 83% of aluminum grades.
Sustainability4
Producing a kilogram of 5B05 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 30%.
Manufacturability7
5B05's machinability is fair (40/100, worse than 81% of aluminum grades); weldability excellent (88/100); formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 5B05 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 5B05
Is 5B05 easy to machine?
Annealed material smears and builds up on the cutting edge; use sharp high-rake tooling, high spindle speed and emulsion or alcohol-based lubricant. Cold-worked tempers break chips much better.
Can 5B05 be welded?
TIG and MIG weldability is excellent using matching 5B05 or ER5356 wire; remove the oxide film, oil and moisture completely before welding to prevent porosity. Not suitable for furnace brazing.
Can 5B05 be formed, bent or molded?
Cold forming and cold heading are good in the annealed state, but work hardening is rapid; multi-stage deep draws need intermediate annealing at about 340-400 °C. Avoid long holds above 65 °C to prevent sensitisation.
5B05 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Mg | 4.7 – 5.7 | 5.2 |
| Mn | 0.2 – 0.6 | 0.4 |
| Siimpurity limit | ≤ 0.4 | |
| Feimpurity limit | ≤ 0.4 | |
| Cuimpurity limit | ≤ 0.2 | |
| Znimpurity limit | ≤ 0.2 | |
| Tigrain refiner / impurity limit | ≤ 0.15 | |
| Betrace Be for oxidation resistance in some casting specs; optional | ≤ 0.01 | |
| Others (each)each other element | ≤ 0.05 | |
| Others (total)total other elements | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 5B05?
Anodizes well, especially after bright or chemical polishing, and also accepts chemical conversion coating and paint. Zincate pretreatment is required before electroplating.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 5B05 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- LF10
How much does 5B05 cost?
5B05 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
5B05 — frequently asked
What is 5B05 used for?
5B05 is typically used for welding wire, cladding layers and welded aluminum structures. In short: al-Mg welding wire grade; cladding and filler stock; 5A05-class strength.
What is the yield strength of 5B05?
5B05 has a typical yield strength of 145 MPa (21 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 68% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is 5B05 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 81% of aluminum grades). Annealed material smears and builds up on the cutting edge; use sharp high-rake tooling, high spindle speed and emulsion or alcohol-based lubricant. Cold-worked tempers break chips much better.
Can 5B05 be welded?
Yes — weldability is rated excellent (88/100). TIG and MIG weldability is excellent using matching 5B05 or ER5356 wire; remove the oxide film, oil and moisture completely before welding to prevent porosity. Not suitable for furnace brazing.
What surface finishes work on 5B05?
Anodizes well, especially after bright or chemical polishing, and also accepts chemical conversion coating and paint. Zincate pretreatment is required before electroplating.
Can 5B05 be formed, bent or molded?
Cold forming and cold heading are good in the annealed state, but work hardening is rapid; multi-stage deep draws need intermediate annealing at about 340-400 °C. Avoid long holds above 65 °C to prevent sensitisation.
What is the maximum service temperature of 5B05?
5B05 is rated for continuous use to about 80°C (176 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 5B05-O and 5B05-H18?
O is the default condition — use the annealed (M) supply state for welding wire, rivet blanks and parts that must be deep drawn or bent; 145 MPa yield with 20% elongation and formability 70. H18: choose the full-hard cold-drawn state for rivet wire and fastener blanks requiring high shear strength (320 MPa yield); elongation falls to 5 %, so forming is largely ruled out. Yield strength is 145 MPa in O versus 320 MPa in H18.
How much does 5B05 cost?
5B05 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASM Handbook Vol.2: Properties and Selection — Nonferrous Alloys (5056/5356 data) — ASM International (1990)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.